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The Best Point of Use Water Heaters

Fact checked by Stephen Conklin

best point of use water heater

The best point of use water heater minimizes heat loss as the hot water travels from the device to the faucet or water appliance. Not only does it improve water distribution. It also leads to better energy and cost savings. Any modern family would love to cut back on its energy expenditure. That is why choosing only the best POU water heater makes perfect sense.


Top 1

 Bosch Tronic 3000 ES4

Voltage 120 V
Amperage 12 A
Power 1.44 kW

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Top 2

EcoSmart ‎ECO 11

Voltage 240 V
Amperage 57 A
Power 13 kW

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Top 3


Voltage 240 V
Amperage 23 A
Power 5.5 kW

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Table of Contents

Best Point of Use Water Heater Reviews

1. Bosch Tronic 3000 ES4 Electric Tank Water Heater

Looking at point of use water heater reviews alone, you already know that the Bosch Tronic 3000 ES4 is one of the best point-of-use heaters on the market today. In truth, it is not easy to get an average of 4.5 stars across thousands of reviewers.

This 4-gallon storage capacity Bosch point-of-use water heater features a revolutionary technology that guarantees up to 98% thermal efficiency. As a result, not only do I enjoy hot water in my sink, I see more substantial savings in my energy bills.

The electric water heater comes with a premium glass-lined interior and CFC-free exterior foam insulation. The storage tank may be small, but its energy efficiency more than makes up for it. In addition, the tank unit is rugged, ensuring continuous operation for many years.

I like its versatile applications. We can use it as a standalone heating unit or as a backup to your central water heater with a storage tank. So we will never have to worry about using cold water ever again. It is also an efficient buffer for tankless heaters with intermittent hot water delivery.

Installation is never an issue. I mounted the device on a side panel under my sink; others place it on the floor with its stable base or secure it on a shelf. Space is never an issue.

I cannot say I love its 3-foot power cord. I had to install an electrical outlet under my kitchen sink because using an extension power cord is never a wise option. While it can serve two sinks simultaneously, do not expect its flow rate to exceed 14.5 ounces per minute.
  • Higher thermal efficiency rating than other POU devices
  • Powerful hot water delivery to two sinks
  • Heavy-duty, glass-lined storage tank for durability
  • Three functions for optimum versatility
  • Multiple installation options for flexibility
  • Modest flow rate at 14.5 ounces per minute
  • Short power 3-foot power cord
Despite these issues, the Tronic 3000 ES4 mini-tank water heater can make modern families happy. They get copious amounts of hot water wherever they decide to install this appliance without worrying about high electric bills.

2. EcoSmart ECO 11 Electric Tankless Water Heater

The EcoSmart ECO 11 unit does not have the elegant and ultra-modern look of the ECO55, but its point of use hot water reviews keep it close to our top pick, the TRONIC 3000 ES4.

What makes this appliance better than our first two picks is its higher cost savings. The tankless unit has a UEF of 0.98 and an energy efficiency rating of 99.8%. Also, its heating elements work like a charm, reducing power consumption and energy expenditures by half.

I also love its higher-than-usual flow rate, capable of delivering up to 3.1 gallons per minute. I can have a warm shower while another family member can use the kitchen sink simultaneously.

This point of use tankless water heater also provides enough hot water supply to run the washing machine.

Like many EcoSmart products, this tankless water heater comes with self-modulating technology. Hence, it improves the appliance’s overall efficiency, translating to better savings. You can also replace its heating elements without calling an expert.

Not everything is positive about this EcoSmart point of use water heater. First, this electric water heater takes about five to six seconds before the water becomes hot enough. Some products only take half the time. Second, this appliance is not ideal for houses with high hot water demand.
  • High energy efficiency and UEF ratings for 50% cost savings
  • Higher flow rate than most tankless water heaters
  • Advanced self-modulating technology for improved efficiency
  • Easy to replace heating elements
  • Lifetime warranty for peace of mind
  • It takes time to heat
  • Not ideal for large homes
Nevertheless, it is efficient, easy to operate, and gives us more substantial savings than most POU water heaters on the market.

3. ECOTOUCH ECO55 Electric Tankless Water Heater

This is not a bland and unappealing design found in most tankless heaters, as the ECOTOUCH ECO55 is perfect for anyone who is already at home with modern touchscreen devices. While its reviews may not be as positive as the Tronic 3000 ES4, it more than makes up for it with its stunning looks and diminutive size.

While small, its heating elements are as efficient as big units. As an electric tankless water heater, it can start giving you a warm bath within three seconds. Other products may take longer to heat. This point-of-use water heater 240V uni is for showering, washing clothes, bathing pets, and cleaning the dishes in seconds.

This tankless water heater has a self-modulating technology that ensures the water stays within the ideal temperature range. It also has safety features that protect the device against leaks, over-voltage, dry heating, and over temperature. Users will have a sounder sleep knowing this point of use tankless water heater will not put you in danger.

I love its touch controls and the high-contrast digital user panel. Such a panel is similar to a modern smartphone or tablet’s user interface, making it an appealing option for tech folks.

My only concern with this appliance is its maximum flow rate of 1.5 GPM. It may not be sufficient for some houses, especially those with high hot water consumption. Moreover, its highest temperature is only 116 degrees Fahrenheit. While this is well within what many people want, some may find it low.
  • Quick-heating element for instant hot water
  • Self-modulating for better energy efficiency
  • Multiple protective technologies for device safety
  • Intuitive touch controls and a bright white-on-black digital screen for ease of operation
  • Sleek, compact, and ultra-modern design
  • Modest flow rate of 1.5 GPM
  • Low maximum outlet temperature reaching 116 degrees F
The ECOTOUCH ECO55 is the perfect solution for high-tech homes that want instant hot water in their kitchen sink, lavatory sinks, and shower. Not only does it look stunning. This device also has a friendly price and takes up a small space.

4. Stiebel Eltron DHC-E 12 Electric Water Heater

Stiebel Eltron is a German brand that has a substantial following as Bosch. While the DHC-E 12 single point water heater does not enjoy as many rave reviews as the TRONIC 3000 ES4, it can hold its own with its efficient and versatile operation.

True to German engineering, this POU tankless heater has one of the most advanced microprocessors on the market. The monitors intake temperature and water flow fluctuations to ensure output temperature consistency.

Furthermore, the tankless unit performs hundreds of micro-adjustments per second to keep the water at the ideal temperature and save much power.

Some users may not like its analog controls, but there is beauty to it. Surrounding its large temperature dial are temperature increments, allowing us to select our preferred temperature more accurately. Combined with its advanced heating microprocessor, I can ensure up to 50% savings with this unit in my house.

I love its versatile applications, too. For example, this tankless unit can serve up to two lavatory sinks or a kitchen and bathroom sink simultaneously. It can also serve up to five low-flow sinks at a time or two medium-flow showers simultaneously. Again, space is the least of our worries.

Use this electric water heater for the dishwasher, hand washing unit, or other water fixture. Its versatility is incredible, and its installation hassle-free.
  • Smart microprocessor technology for more efficient operation
  • Straightforward and easy-to-set temperature dial
  • Ideal for multiple applications
  • Energy-efficient design for energy savings of up to 50%
  • All-copper heating element for durability
  • Costs more than many competing products
It is inconsequential if you believe in German technology and craftsmanship. It is a versatile water heating device that is suitable for a variety of applications. The tank also saves us money from energy expenditure, making that much-awaited holiday vacation more of a certainty than a possibility.

5. Ariston Andris Mini-Tank Electric Water Heater

Reading the Ariston Andris point of use electric water heater reviews, you cannot shake that feeling that it is one of the best on the market. It has a compact design for mounting convenience and reliable instant hot water for a small-sized home.

Unlike other electric points of use water heaters, this appliance’s power consumption will never be a burden on the electric bill. This point of use water heater 120V unit only draws about 1,400 watts, unlike the 5.5-kW rating of others. While you may think it is insufficient in water heating, you will be surprised at its efficiency.

The best point of use heaters always delivers hot water within seconds. This device can bring hot water to your shower, bathroom sink, and other appliances and fixtures within three to four seconds.

I love the product’s TitanShield technology that combines a glass-lined interior’s unparalleled corrosion resistance and a titanium exterior’s thermal efficiency and durability. I feel confident about this electric point of use unit serving my home for many years.

The point of using an electric water heater can serve as a standalone unit or as a booster to the existing tankless heater. Installing it is also straightforward. Although, I recommend getting an expert to eliminate leaks and other potential problems.

Given its 2.5-gallon storage capacity mini tank, I do not advise large households to buy this unit. Families with a high hot water consumption may also need to look elsewhere unless they only use this as a booster.
  • 4 kW power input for better energy savings
  • A quick-heating mechanism for instant hot water
  • Glass-lined, premium titanium mini tank for durability
  • Dual mounting options for installation flexibility
  • Dual-purpose design for versatile applications
  • Expert installation recommended
  • Not for a large house
Overall, I like Ariston Andris. It has a cubicle design that sets it apart from ordinary brick-type heaters. It saves you money and works like a charm, too.

6. Thermoflow UT10 Electric Mini Tank Water Heater

The Thermoflow UT10 is one of the best point of use water heating devices we can buy. It is compact, will not use up space, easy to use, and efficient in its core function, perfect for any home.

This 2.5-gallon tank electric water heater is ideal for different applications, including the bathroom, laundry, utility room, and others. However, this is, first and foremost, a point of use tankless water heater for kitchen sink. We will never have any issues washing your dishes, rinsing our food, or cleaning our face with warm water.

Do not worry about its power consumption because it only utilizes 1,500 watts. Its ECO mode will also keep your energy expenditure to a minimum. It is sufficient to give a whole family adequate hot water for their needs without fretting about its space.

I am blown away by the device’s robustness. With its advanced freeze protection and IPX24 waterproofing, you can install this device outside your home. Instant hot water will always be available.

I love its Thermostop technology that minimizes heat loss between the device and the tap. So I get all that heat in my water and not in the environment. It also helps that its stainless steel tank has EPS foaming technology. Generating up to 50% savings is easy with this baby.

I have only one concern about this point of use heater: its pressure tolerance is lower than other POU units. As a result, it can only accommodate a maximum of 150 PSI.
  • Recommended for sink applications
  • Low power requirement for energy savings
  • IPX24 certification and antifreeze technology for outdoor use
  • Advanced Thermostop technology for lower heat loss
  • Maintenance-free stainless steel mini storage tank for durability
  • Lower pressure tolerance than other POUs
Regardless, small families will still find the Thermoflow UT10 suitable for their under-sink POU needs. It is robust enough to become a reliable outdoor water heater without sacrificing its water heating capabilities.

7. EcoSmart POU Electric Tankless Water Heater

The EcoSmart POU 3.5 is a 120V point of use water heater suitable for homes that only require hot water in one sink. It is as efficient as any other water heater that bears the EcoSmart badge.

This point of use electric tankless water heater only requires 3,500 watts to deliver instant hot water to our home.

Like the brand’s other products, this sink tankless water heater features a self-modulating technology that constantly monitors intake temperature and water flow. The system makes the necessary adjustments to deliver consistently hot water without requiring user input.

Speaking of user input, I love this appliance’s large and bright digital temperature display. It only has a single touch button to power the unit. The tankless water heater handles all the temperature adjustments for me, ensuring my family gets only the ideal water temperature from the faucet.

This product is also effortless to install and maintain, thanks to its field-replaceable elements. There are no worries about its quality, either. All of its components have certification from ETL and UL, giving me peace of mind and ensuring safety for my home.

My only gripe about this unit is its low GPM rating. At 0.5 gallons per minute, the only thing I can use this for is in a standard-flow kitchen faucet. That is why it is only for a single sink. It will come out more expensive if users decide to install several of these units in their home’s different fixtures.
  • Low power draw for optimum energy savings
  • Advanced self-modulating technology for enhanced efficiency
  • Digital temperature control and display for operational ease
  • Replaceable heating elements for easy maintenance
  • UL and ETL certification for product quality
  • Lower GPM than other POUs
  • Only for single sink application
Nevertheless, I think the EcoSmart POU 3.5 point of use tankless water heater deserves consideration, especially for anyone who only needs hot water from one specific faucet. The energy savings we get is worth it.

8. BISELONG Electric Mini-Tank Water Heater

Some may not recognize its brand, but BISELONG currently makes headway into the competitive point of use water heater market with its compact Electric Mini Tank Hot Water Heater. It is suitable for a budget-conscious home.

Unlike most POU water heaters, this product has a cube shape to protect its 2.5-gallon stainless steel mini tank. It ensures minimal heat loss, providing my family with up to 98% of thermal efficiency. It can translate to better cost savings, thanks to its 1.5-kW heating element.

Speaking of the heater, I find it rewarding that the company used inverter technology. Homeowners who already have inverter-integrated appliances know how the technology translates to better savings.

I love the straightforward and uncluttered design of its controls. A large knob lets me dial in my desired temperature. Two LED indicator lights if the unit is heating or insulating. Even my kid will have no issues operating this water heater.

I think budget-conscious families will love this point of use water heating device. In truth, it costs a fraction of other products’ prices.

For anyone seeking an electric point of use water heater for shower, I recommend choosing another product. While this appliance is efficient, heating water takes some time. This electric point of use unit also needs about 8 to 15 minutes to recover the ideal water temperature. Moreover, please do note that the company only covers the product for a year.
  • 98% thermal efficiency for minimal heat loss
  • Advanced Inverter technology for better cost savings
  • Simple controls for ease of operation
  • Heavy-duty, corrosion-resistant stainless steel tank for durability
  • More affordable than other POUs
  • Takes a while to heat
  • Only one-year warranty
As a kitchen sink water heater, the BISELONG is a wise buy. Not only is it affordable upfront, but its inverter technology is worth the investment in the long run. It looks cute in a modern home, too.

9. Agust BIS03 Electric Hot Water Heater

If you did not notice, many point of use hot water heaters are the same except for a few minor features. The similarities cannot be more glaring than between the Agust BIS03 and the BISELONG. From the performance to the integrated technologies, both water heaters are alike. They only have a different user control design.

I love this point of use heater’s user control panel, making it more appealing than the BISELONG. Besides, the company provided a large digital temperature display. It allows you to know the temperature you are setting with its large knob.

This product also has a larger mini-tank than the BISELONG. While an additional half-gallon capacity may not be enough for some people, you should know that its design is still that of an on-demand heater.

We only need the tank for preserving hot water, making it available in an instant. It might even work as a point of use water heater for washing machine.

I also like its intelligent inverter technology. When combined with its 98% thermal efficiency rating, you can rest assured that your energy bills will not take a hit. Quality and safety are also not a concern since the product already comes with a CSA certification and UL and FCC-listed parts and components.

Unfortunately, this water heater also requires 8 to 15 minutes of recovery. It also has a short warranty of only 12 months.
  • 98% thermal efficiency for improved heat preservation
  • Smart inverter technology for better savings
  • 3-gallon stainless steel mini storage tank for better heat preservation
  • Large temperature display and user-friendly dial for ease of operation
  • FCC, CSA, and UL-listed parts and components for quality
  • Takes up from 8 to 15 minutes of recovery
  • Offers 12 months of warranty only
Nevertheless, you can have a point of use tankless water heater that works on two of your kitchen or lavatory sinks. Now that is good value.

10. Stiebel Eltron 231045 Tankless Electric Water Heater

Since 1924, Stiebel Eltron relies on its Thermo technology experience to produce crowd-pleasing products. For example, its Mini 2-1 is perfect for homes that have low-flow faucets and other water fixtures.

I love this product’s ultra-sleek design. I can install this unit in the open and never worry about the tankless water heater becoming an eyesore.

There are no buttons to press, dials to twist, and switches to flick. Instead, it comes with a pigtail for effortless hardwiring into your electrical system. The device does all the monitoring and temperature and output adjustments on the fly.

Compared to other tankless points of use heaters, this unit has a UEF rating of 0.99. So it lets me save more money from your water heating.

I also like the brand’s 7-year warranty against leaks, although I know some brands can offer more. The 3-year warranty on parts is also better than most brands. After all, this is a German brand that is famous for its reliable and heavy-duty products.

This unit is not for those who want a point of use tankless water heater for shower. It restricts its output flow to less than a third of a gallon (0.32 gallons) per minute. So, I cannot even use it on my high-flow faucet.
  • 99 UEF for better cost savings
  • Smart self-modulating technology for efficient operation
  • Super-sleek and compact design for installation ease
  • Pre-wired pigtail for effortless installation
  • 7-year leak warranty, 3-year parts warranty
  • Internally-restricted flow rate
Nevertheless, the Stiebel Eltron Mini 2-1 remains an excellent choice for households that want a reliable heater for hand washing purposes. The unit is easy to hardwire, effortless to operate, and performs well for its intended purpose.

11. Camplux TE06 Electric Tankless Water Heater

We all love an ultra-modern, sleek-looking device in our homes. The Camplux TE06 tankless water heater offers that and a heating efficiency very few point of use water heaters can match.

This appliance looks cool and intuitive. The touch button controls are a joy to operate. Its digital temperature display information is also pleasant to the eyes. Making adjustments is as effortless as swiping the screen of your smartphone. I can even toggle between Celsius and Fahrenheit measurements.

Inside this beautiful point of use tankless water heater is a heating element that ensures instant hot water delivery 24/7. It has multiple applications, including the kitchen, bathroom, office, utility room, and more. Buyers can also install it upside down if they want it displayed on the kitchen backsplash. Because of its versatility, it can even pass as a point of use water heater for bathtub.

Like many Camplux products, this tankless water heater features numerous protective mechanisms. A special sensor detects leaks, giving the user the chance to correct them right away. The device also has ample protection against over-voltage, dry combustion, and over temperature. We also get peace of mind from its NSF and ETL qualifications.

Beyond that, the company recommends expert installation to avoid leaky issues and electrical safety concerns.
  • Delivers instant hot water 24/7
  • Multifunction design for improved versatility
  • Multiple protection technologies for enhanced product safety
  • Smart user interface for hassle-free operation
  • ETL and NSF certification for greater assurance
  • Expert installation recommended
I love the Camplux TE06 tankless water heater because of its elegant look and water heating abilities. Its flow rate may not be that much, but it is a lot better than other brands.

12. Thermoflow Elex 3.5 Mini Electric Tankless Water Heater

Thermoflow continues to persevere in becoming a leading water heater brand with its Elex 3.5 Mini. This electric tankless water heater is so compact it looks more like a slightly bigger iPad Mini 5 in width and length. Anyone can hold the device in their palm conveniently.

Although small, this electric water heater packs a whopping punch, heating water instantly. It has an advanced self-modulating system that monitors and adjusts the temperature to your desired level. This device can save you up to 60% of energy bills, thanks to its 99% point of use water heater efficiency and 0.98 UEF rating.

I am also surprised by its robust construction. It has an IPX24 rating that suggests the appliance will do well outdoors. However, I would caution about installing it outdoors if you live in a cold climate area. This appliance does not have freeze protection, so it would be wise to keep it an indoor-only water heater.

The device also meets the strict requirements and standards of both the US and Canada, giving me confidence about its quality and performance.

Please, do not expect this compact point of use water heating appliance to give you copious amounts of water at a time. It can only provide half a gallon of hot water every minute.
  • 98 UEF, 99% efficiency rating for better energy and cost savings
  • Smart self-modulating system for temperature consistency
  • IPX24 rating for excellent waterproofing
  • Super compact design for installation flexibility
  • CSA-certified for quality and performance
  • A flow rate of half-gallon per minute
I love the Thermoflow Elex 3.5, and you should, too. It is one of the most compact tankless point of use water heaters one can buy that never detracts from its promise of delivering hot water instantly.

13. Rheem RTEX-04 Electric Tankless Water Heater

The Rheem RTEX-04 is an electric tankless water heater suitable for a single low-flow faucet, such as the kitchen or bathroom sink. This point of use tankless water heater has an elegant rectangular design that makes it appealing to households that are already tired of the usual boxy or brick shape of such water heating appliances.

This Rheem point of use water heater is perfect for modern households with low to moderate hot water needs. It can deliver instant hot water as long as the water pressure does not exceed 150 PSI. Its 140-degree Fahrenheit maximum water temperature is sufficient for many homes.

Inside its elongated housing is a heavy-duty copper heating element that extends the appliance’s service life. It should be safe to use in homes with moderate to high levels of water hardness.

I like this point of use tankless water heater’s temperature display because it is bright and large. You will never have issues reading the temperature. Unfortunately, this appliance does not feature thermostatic controls. It only relies on its self-modulating technology to adjust the temperature for you.

Another concern one might want to know before buying this point of use tankless water heater is its flow rate. At half a gallon per minute, do not expect this device to give you an enjoyable shower or a more thorough cleaning in your washing machine.
  • Recommended for kitchen sinks
  • Efficient up to 140 degrees Fahrenheit and 150 PSI
  • Heavy-duty copper heating elements for durability
  • High-contrast digital temperature display
  • Stylish and compact design
  • Lower GPM than conventional tankless water heaters
  • No manual adjustments
Regardless, the RTEX-04 point of use tankless water heater remains the choice of loyal Rheem fans. I also recommend it to anyone who wants a reliable water heater for one or two low-flow taps in their homes. It is effortless to operate, an absolute joy to have in the house.

14. Atmor AT-900-03 Tankless Electric Water Heater

Some people do not need hot water coming out from every faucet and water appliance in their house. In that case, they prefer the Atmor AT-900-03 Single Sink Tankless Electric Water Heater perfect.

The first thing I notice about this tankless point of use heater is its compact size and horizontally elongated shape. Most products we see come in a vertically long design. I find this design attribute suitable for homes with tight spaces. All we need is a 12 by 7.5-inch space, and we can already mount this model virtually anywhere. Installation should be a breeze.

This point of use electric hot water heater only draws 3 kW of electricity. Anyone needs a device with a higher power rating, the brand also offers 3.5-kW, 3.8-kW, 7-kW, and 13-kW models. I think the 3,000-watt version is perfect for a small house.

While simple in design, this under-sink tankless water heater does not forget safety. It incorporates a pressure relief valve to ensure the device will not blow up in your face. I do not think this is necessary, considering the appliance has one of the highest water pressure thresholds of 230 PSI. Most products I know limit their pressure tolerance to below 200 PSI.

I appreciate this appliance’s straightforward user control panel, consisting only of two switches. Unfortunately, I will never know the heater’s actual working temperature. I also cannot set this tankless heater to my preferred temperature. Moreover, its 0.5 GPM flow is about 75% lower than the average.
  • Ideal for single sink applications
  • Low power rating for improved energy savings
  • Built-in pressure relief device for safety
  • Higher pressure tolerance than other brands
  • Compact and space-saving design for installation ease
  • Lower flow rating than other POUs
  • No device information display
Despite these concerns, I will recommend the Atmor AT-900-03 point of use tankless water heater for anyone who only wants hot water in a single sink. Its pressure tolerance is remarkable, and its heating efficiency is impeccable.

What is the Best Point of Use Water Heater/ Who This is for


The best point of using a water heater not only delivers instant hot water supply to your home. It also minimizes unnecessary heat loss secondary to the hot water’s length to move between the heater and the fixture. It translates to lower power consumption, better energy use, and more substantial savings.

In our list of the best point of use water heaters, the Bosch Tronic 3000 ES4 comes out on top because of its energy efficiency, thoughtful design, flexible installation options, and versatile applications. It is a single point water heater worthy of any modern home.

A point of use water heater is suitable for anyone who needs hot water in only one fixture or water appliance in their house. It is also ideal for offices and commercial establishments that require hot water for their handwashing stations.

How Do Point of Use Water Heaters Work

A point of use water heater works in the same way as other water heaters, regardless of type. The cold water enters the water heater to raise its temperature to the desired level. Hot water then goes out the outlet port and into the fixture a short distance away. The fixture can be a faucet, clothes washer, dishwasher, or any other fixture or appliance that requires hot water.

In a tank water heater, the cold water goes to the tank first where it gets heated either by electricity or gas. A tankless point of use water heater works differently because there is no tank for the water to stay. Instead, it circulates through a series of tubes or pipes within a heat exchanger system.

A gas point of use water heater requires propane or natural gas to power the burner and heat the water. On the other hand, a point of use electric tankless water heater relies on electricity to heat the water as it goes through the device’s internal pipes.

Advantages and Disadvantages of Using a Point of Use Water Heater


The following are the advantages of a point of use water heater.

  • Energy Efficiency

The principal advantage of a point of use water heater is its energy efficiency. Compared to central water heaters, the distance between the heater and the fixture it serves is relatively short. This short distance helps minimize heat loss that can occur as the heated water moves from the water heater to the sink faucet or water appliance.

  • Minimizes Water Wastage

Another advantage is it minimizes water wastage. When you open your faucet or shower, you already get hot water. In a central water heating system, it takes a few minutes before the water heats up.

Additionally, hot water will still be present in the pipe between the heater and the fixture when you close your tap. Since you already closed the faucet, you will not use the hot water anymore. The energy spent on its heating goes to waste.

  • Improved Cost Savings

Point of use water heaters are also more cost-efficient than conventional systems since you only use them to heat water from a single source. Installation costs are also lower. If you choose correctly, your water heater can serve you for up to 25 years.

Point of use water heaters can also have their negatives.

  • Lower Flow Rate

In general, a POU system has a lower flow rate than your central water heater. That is why you must choose the right product.

  • Not Ideal for Whole House Applications

It is crucial to remember that a POU water heater is suitable only for a single or double sink application. If you need to produce hot water in all of your water fixtures and appliances, a centralized system is more ideal.

Point of Use Water Heater Buying Guide

Buying the best point of use water heating device is not that different from buying any type of water heater. The following are a few pointers you can consider.

Tankless or With Tank?

Learn the difference between a tank point of use water heater vs tankless systems. A water heater with a storage tank may offer you some flexibility when you need more hot water than anticipated. Of course, do not expect the tank to hold 20 or 50 gallons. At most, you may only get a device with a 6-gallon built-in tank.

On the other hand, tankless units are suitable for point of use applications because they do not occupy a lot of space. They are also easy to install.

Electric or Gas?

The majority of point of use water heaters run on electricity, either plugged or hardwired to your electric system. There are also gas units if you want. However, a major issue here is the correct venting.

Heating Efficiency

Always choose a point of use water heater with a high energy efficiency rating or a high UEF score. It would also be wise to check for credible certifications from reputable organizations, such as Energy Star, NSF, CSA, UL, and others.

As much as possible, do not get a product with an efficiency rating of less than 95% or 0.95 EUF.

Water Heating Parameters

It would be ideal to buy a single point water heater that best serves your needs. It must provide you with the same flow rate as that of your water fixture. It should also be able to raise the water temperature to your desired level in the shortest time possible.

Installation Ease

While point of use water heaters are easy to install, always check the manufacturer if expert installation is a must to avoid voiding its warranty. Plugged units are always easier to install than units that require hard-wiring to your house’s electrical system. Reading several water heater review articles should give you an idea about a product’s installation ease.


Always pick a product that has a longer warranty. However, it is crucial to understand that a product with an extended warranty is oftentimes more expensive than a unit with a 1 or 2-year warranty.

Frequently Asked Questions


Who makes the best point of using a water heater?

Bosch has led the world in thermotechnology for more than 125 years. While it did not produce the first water heater, its subsidiary, Junkers, did in 1894. Today, this German brand continues to wow modern homes, making their lives more comfortable with innovative, easy-to-use, reliable, and efficient warming technologies. If you are looking for the best point of use heater, Bosch is a sure bet.

Other brands with an excellent reputation in POU heaters are Stiebel Eltron, Rheem, Camplux, and EcoSmart. ECOTOUCH is also slowly making a name for itself, while Ariston, Atmor, Thermoflow, BISELONG, and Agust are catching up.

What size point of use water heater do I need?

Sizing the correct water heater requires more than understanding your space requirements. While the space under your kitchen sink matters, a more important consideration is the appliances’ ability to deliver hot water sufficient to your needs.

One factor is the fixture’s maximum flow rate. For instance, a typical shower can have a flow rate of 1.5 to 3 GPM, while a kitchen sink faucet may require about 2 to 3 GPM. Your washing machine may need a device capable of piping 3 to 5 gallons of hot water per minute.

Using this information, you can look for a tank unit or a tankless water heater with a higher GPM than your fixture’s average GPM.

Another factor you must consider is the temperature rise relative to the cold water temperature. If you live in freezing conditions, you may need a unit that heats the water fast without causing a substantial drop in GPM.

Suppose you want a 110-degree Fahrenheit hot shower and you have a cold water temperature of 50 degrees Fahrenheit. The unit you choose should be capable of raising the temperature by 60 degrees while maintaining its optimum GPM.

How to install a point of use water heater?

Installation costs are always a primary concern of many families. Thankfully, a POU water heater is not that difficult to install.

First, secure your main water line to cut off your water supply. You may also want to open all faucets to empty the water in the pipes.

Next, cut a section of the water line where you will place the water heating system. Connect and secure the fittings to the heater. Additionally, connect the fittings to the cut ends of your water supply line. Ensure the cold water pipe connects to the device’s intake port.

Connect the device to your electrical system either by hardwiring it or plugging its power cord into an outlet.

Close all faucets and open the main water supply valve. Open a tap to clear air from the pipes. Plug your POU water heater and turn it on.

Can you use a point of use water heater for a shower?

Yes, you can use a POU water heater for a shower. You can install it next to any water fixture or appliance you want to deliver hot water, including lavatory sinks, washing machines, kitchen sinks, pet bathing stations, and more.


The best point of use water heater not only gives you hot water where you need it most. It also provides you with more substantial savings you can include in your growing vacation or special treats fund.

It is energy-efficient, easy to install and operate, and lasts a long time if you care for it properly. The only way you can enjoy these benefits is if you choose correctly.

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